[lines=2, nindent=0em, lraise=0.1]The use of entanglement resources in classical communication scenarios has been shown to reduce communication resources [1]}, increase capacity of channels [2]}, and enable communication [3]}, [4]}. Entanglement can moreover be used to improve upon protocols for secure multi-party computation and communication [5]}, [6]}, allowing parties to compute a common function securely. In this work, we introduce a communication scenario with a single sender broadcasting classically encoded messages to \(N\)  receivers. To decode the messages, the receivers must cooperate, or conference [7]}, with one another or otherwise, because of the channel's causal properties, the capacity of the channel vanishes. This scenario mimics one where a sender broadcasts a message to a collection of receivers such that either all receivers receive the message or none of them receive it, based on their mutual cooperation.
